The suspect appears to be a Caucasian male, possibly in his 30s or 40s, with a receding hairline and wearing wire-framed glasses.

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The FBI is seeking the public's help in identifying and finding a suspected child predator who has been captured in videos and pictures sexually assaulting a child.

There are no specific details linking the suspect - John Doe 28 - to a particular state or region of the country, and both his identity and whereabouts are currently unknown. But the FBI has enhanced images and video of a man engaging in sexually explicit acts with a child and believes the images contain clues that could lead to his capture or help save a child who is being held somewhere against his or her will.